Display screen or portion thereof with transitional graphical user interface



FIG. 1 is a front view of a first image in a sequence for a displayscreen or portion thereof with transitional graphical user interfaceaccording to a first embodiment; and

FIG. 2 is a front view of a second image in the sequence thereof.

FIG. 3 is a front view of a first image in a sequence for a displayscreen or portion thereof with transitional graphical user interfaceaccording to a second embodiment; and

FIG. 4 is a front view of a second image in the sequence thereof.

FIG. 5 is a front view of a first image in a sequence for a displayscreen or portion thereof with transitional graphical user interfaceaccording to a third embodiment; and

FIG. 6 is a front view of a second image in the sequence thereof.

FIG. 7 is a front view of a first image in a sequence for a displayscreen or portion thereof with transitional graphical user interfaceaccording to a fourth embodiment; and,

FIG. 8 is a front view of a second image in the sequence thereof.

The appearance of the claimed design transitions between the imagesshown in FIGS. 1 to 2, between the images shown in FIGS. 3 through 4,between the images shown in FIGS. 5 through 6, and between the imagesshown in FIGS. 7 through 8, respectively. The process or period in whichone image transitions to another forms no part of the claimed design.

The outermost broken line rounded rectangle showing an electronic deviceillustrates environmental subject matter. The broken line showing adisplay screen, and all other broken lines showing portions of thegraphical user interface illustrate portions of the article. None of theaforementioned broken line subject matter forms part of the claimeddesign.

CLAIM The ornamental design for a display screen or portion thereof withtransitional graphical user interface, as shown and described.